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(No Model.)

0. A. MATHIESEN.

TYPE WHEEL FOR PRINTING TBLEGRAPHS. N0.320,3'76. Patented June 16, 1885.

WITN E55E5 INVENTDR mm *& w

CARL A. MATHIESEN, OF NEW YORK, N. Y.

TYPE-WHEEL FOR PRlNTlNG-TELEGRAPHS.

SPECIFICATION forming part of Letters Patent No. 320,376, dated June 16, 1885.

Application filed September 4, 1884.

To all whom it may concern Be it known that I, CARL A. MATHIESEN, a citizen of the United States, residing in the city, county, and State of New York, have invented a new and useful Improvement in Type-\Vheels for Printing-Telegraph Instruments, of which the following, taken in connection with the accompanyingdrawings, is a full, clear, and accurate description.

The object of my invention is to produce a type-wheel especially adapted to printing-instruments used in brokers ofiices for printing stock-quotations, though not confined to this purpose, which will afford, by reason of its extreme lightness, less resistance to the electric current, and thereby be much more rapid in its action than the type-wheels at present in use for printing-telegraph instruments and like purposes.

In the drawings, Figure 1 represents my type-wheel entire. Fig. 2 shows a segment of the rim with the skeleton letters thereon, such letters being enlarged to show the invention more clearly. Fig. 3 represents a section of U'DBWllCGl enlarged.

My invention consists in cutting away the rim of the wheel as much as possible, only leaving suflicient material to afford a support for the type, and cutting out all the material possible from the type-letters, so that they shall rest on the rim in skeleton form.

In the drawings, A represents the type-wheel rim, and B the letters in skeleton form resting thereon. In this way a wheel is formed which will print much faster, its extreme lightness affording less resistance to the electric current, while its efficiency in printing clearly is increased by cutting out all the material except the printing portion of the letters.

Another advantage of forming type-wheels (No model.)

lin this manner with the letters in skeleton 2 form is that the liability of the type being i filled up and clogged with ink and other substances is much diminished. In the ordinary l typewheels now in use in telegraph-printing instruments this frequently occurs, ink and other substances, by thus clogging the type, both adding to the weight of the wheel and interfering with the clearness ot' the impressions made by the letters. \Vhen such clogging occurs, it is necessary to thoroughly clean the wheel, Which is a work of much in- I there is little or no clogging of the type, and the letters can be readily cleaned by rubbing with a dry brush, when all substances lodged in the type will immediately fall through the open spaces in the letters.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s-

1. A type-wheel having its rim cut away so as to leave a narrow foundation or support for the type, and provided with skeleton type arranged thereon, and having substantially all of the material thereof removed excepting the mere outline of the character represented thereby, substantially as described.

2. A type-wheel for printing-telegraph in strunients and like purposes, having type from which all of the material is removed excepting the mere outline of the character represented, substantially as described.

in testimony whereof I hereunto set my hand this 1st day of September, 1884.

G. A. MATHIESEN.

IGOHVQIJIGIICO, while in my lmproved wheel l In presence of R. T. VAN BosKnncK, CHARLES G. (Jon. 

